2009398 - [Experiment] The “Updated sidebar coming soon” callout message is misplaced when the Sidebar toolbar button is moved from its default place

Status: NEW

(Firefox :: Messaging System, defect)

Description

[Carmen Fat [:cfat] - Ecosystem QA]

Attachment: misplaced callout.mp4

[Affected versions]:

• Firefox RC 147.0 (Build ID: 20260105210555)

[Affected Platforms]:

• Windows 11 x64
• Ubuntu 24.04 x64
• macOS 15.1

[Prerequisites]:

• Have a Firefox 147.
• Be enrolled in the “Old sidebar deprecation - Release” experiment.
• The “Updated sidebar coming soon” callout message was not triggered yet.

[Steps to reproduce]:

1. Open the browser with the profile from the prerequisites.
2. Right-click on the tabs strip and click the “Customize Toolbar…” option.
3. Drag and drop the Sidebar button to the right side of the Address Bar.
4. Navigate to a website.
5. Observe the “Updated sidebar coming soon” callout.

[Expected result]:

• The arrow points to the Sidebar toolbar button.

[Actual result]:

• The arrow points to the Address Bar, and the callout is displayed on the right part of the Address Bar.

[Notes]:

• Attached is a screen recording of the issue.